complaint reveals that agents searched dzhokhar tsarnaev's u. mass dartmouth dorm room and they found bbs and large pyro tech. investigators found a bomb of the same brand of pressure cooker used in the bombs in the thursday night shoot-out. >> within minutes i had six of my officers, four on duty, two off duty, that are engaged in this gun fight. it continues and the bad guys go back to one of their vehicles an open a trunk at some point and that's when they heave something at our officers and there is a huge explosion. that's the first bomb that went off. that was the one that had the pressure cooker, the little bit of it was embedded in the car down the street. how my officers survived just that was remarkable. >> for the first time the s.w.a.t. team which made the final arrest on friday night told their story. >> when we were moving up to the boat he was actually laying down on the side of the boast, one leg out, one hand out. >> did he say anything to you? did he do anything? >> i don't think he had the energy to say anything. once we got h